Abstract: The invention relates to an arrangement composed of a measuring device and a container, wherein the measuring device (1) is suited for insertion into the container, which contains the medium to be measured, and wherein the container for receiving the measuring device (1) has a connector piece (20) having a passage opening extending in an axial direction and a seal land (22) projecting into the passage opening, wherein the measuring device (1) comprises a rotationally symmetric housing part (10), which is flush with the connector piece (20) and has an external cone portion (11), which forms with an internal cone portion (21) provided on the connector piece (20) a beveled sealing surface pair.

Abstract: A conical flange of a temperature sensor for hygienic applications as a deep drawn part with a disk-shaped lower part 30c and an upper part, wherein the upper part partially serves as clamping surface is provided.

Abstract: A method measures the positions of centers of curvature of optical surfaces of a multi-lens optical system. The spacings between the surfaces are measured along a reference axis using an interferometer. Subsequently the centers of curvature of the surfaces are measured using an optical angle-measuring device. In the course of the measurement of the position of the center of curvature of a surface situated within the optical system, the measured positions of the centers of curvature of the surfaces situated between this surface and the angle-measuring device and the previously measured spacings between the surfaces are taken into consideration computationally. In this way, a particularly high accuracy of measurement is achieved, because desired spacings do not have to be fallen back upon.

Abstract: A method for measuring spacings between optical surfaces of a multi-lens optical system includes detecting the centring state of the optical system by taking into consideration all optical surfaces of the optical system. Then the optical system is adjusted in such a way, taking the centring state into consideration, that the optical axis of the optical system is aligned as far as possible with a reference axis. In a next step the spacings between the optical surfaces are determined with the aid of a short-coherence interferometer. The measuring-light ray directed onto the optical system for this purpose runs likewise along the reference axis.

Abstract: A conical flange of a temperature sensor for hygienic applications as a deep drawn part with a disk-shaped lower part 30c and an upper part, wherein the upper part partially serves as clamping surface is provided.

Abstract: A method for measuring spacings between optical surfaces of a multi-lens optical system includes detecting the centring state of the optical system by taking into consideration all optical surfaces of the optical system. Then the optical system is adjusted in such a way, taking the centring state into consideration, that the optical axis of the optical system is aligned as far as possible with a reference axis. In a next step the spacings between the optical surfaces are determined with the aid of a short-coherence interferometer. The measuring-light ray directed onto the optical system for this purpose runs likewise along the reference axis.

Abstract: A method measures the positions of centres of curvature of optical surfaces of a multi-lens optical system. The spacings between the surfaces are measured along a reference axis using an interferometer. Subsequently the centres of curvature of the surfaces are measured using an optical angle-measuring device. In the course of the measurement of the position of the centre of curvature of a surface situated within the optical system, the measured positions of the centres of curvature of the surfaces situated between this surface and the angle-measuring device and the previously measured spacings between the surfaces are taken into consideration computationally. In this way, a particularly high accuracy of measurement is achieved, because desired spacings do not have to be fallen back upon.

Abstract: A measurement device for process measurement engineering with a measurement unit (2) and an evaluation device (3), the measurement unit (2) having a sensor, especially a temperature sensor, and the evaluation device (3) containing at least most of the electrical and electronic components and having a display and/or an adjustment capability. The number of types of measurement devices required to be maintained can be reduced and their possible applications increased by the measurement device (1) being modular and the measurement unit (2) and the evaluation device (3) being detachably interconnected both electrically and mechanically via standardized interfaces.